3 files changed, 14 insertions, 3 deletions
diff --git a/src/cmd/compile/internal/syntax/dumper_test.go b/src/cmd/compile/internal/syntax/dumper_test.go
index 32337eb6f1..f84bd2d705 100644
--- a/src/cmd/compile/internal/syntax/dumper_test.go
+++ b/src/cmd/compile/internal/syntax/dumper_test.go
@@ -5,7 +5,6 @@
 package syntax
 
 import (
-	"os"
 	"testing"
 )
 
@@ -21,6 +20,6 @@ func TestDump(t *testing.T) {
 	}
 
 	if ast != nil {
-		Fdump(os.Stdout, ast)
+		Fdump(testOut(), ast)
 	}
 }
diff --git a/src/cmd/compile/internal/syntax/printer_test.go b/src/cmd/compile/internal/syntax/printer_test.go
index bc78f01265..c3b9aca229 100644
--- a/src/cmd/compile/internal/syntax/printer_test.go
+++ b/src/cmd/compile/internal/syntax/printer_test.go
@@ -6,6 +6,8 @@ package syntax
 
 import (
 	"fmt"
+	"io"
+	"io/ioutil"
 	"os"
 	"strings"
 	"testing"
@@ -23,7 +25,7 @@ func TestPrint(t *testing.T) {
 	}
 
 	if ast != nil {
-		Fprint(os.Stdout, ast, true)
+		Fprint(testOut(), ast, true)
 		fmt.Println()
 	}
 }
@@ -44,3 +46,10 @@ func TestPrintString(t *testing.T) {
 		}
 	}
 }
+
+func testOut() io.Writer {
+	if testing.Verbose() {
+		return os.Stdout
+	}
+	return ioutil.Discard
+}
diff --git a/src/cmd/compile/internal/syntax/scanner_test.go b/src/cmd/compile/internal/syntax/scanner_test.go
index 717deb9073..d76231a4af 100644
--- a/src/cmd/compile/internal/syntax/scanner_test.go
+++ b/src/cmd/compile/internal/syntax/scanner_test.go
@@ -30,6 +30,9 @@ func TestScanner(t *testing.T) {
 		if s.tok == _EOF {
 			break
 		}
+		if !testing.Verbose() {
+			continue
+		}
 		switch s.tok {
 		case _Name:
 			fmt.Println(s.line, s.tok, "=>", s.lit)